A telescopic power cord for energy-saving LED lamps and energy-saving LED lamps

Abstract

The application discloses a telescopic power line for energy-saving LED lamps and lanterns and the energy-saving LED lamps and lanterns, which comprise a power line body and a winding unit, and the winding unit comprises an outer cylinder part, an inner cylinder part, a fixing base, a first fixing ring, a second fixing ring, a third fixing ring, a plurality of first connecting rods, a plurality of second connecting rods and three guide wheel units. The telescopic power line can adjust the length of the extension according to actual requirements, thereby avoiding installation problems caused by improper length. The power line body is uniformly distributed in the outer cylinder part and can avoid winding, thereby reducing heat accumulation, reducing safety hazards caused by overheating and prolonging the service life of the power line. The LED lamps and lanterns are provided with holes in the first, second and third fixing rings, and when the LED lamps and lanterns work, the convection air current can enter the inside of the LED lamp head shell through the holes, plays a heat dissipation role on the power line body and guarantees stable operation of the lamps and lanterns.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lamps and lanterns, and more particularly to a telescopic power cord for energy-saving LED lamps and lanterns and an energy-saving LED lamps and lanterns. BACKGROUND

[0002] LED lamps and lanterns have been widely used in modern lighting due to the energy-saving nature of LED light sources. Compared with traditional incandescent lamps and fluorescent lamps, LED lamps and lanterns have significant advantages in energy consumption, lifespan, environmental protection, and other aspects, and have become the mainstream choice for green lighting. With continuous technological innovation, LED lighting will play an important role in more fields and contribute to sustainable development.

[0003] When the LED lamp head is connected to the mains or solar power supply, a power cord is needed. However, due to different specifications of the lamp head, as well as different factors such as the lamp head support used and the installation location, the actual length of the power cord needed is different. This need is more obvious for some non-standardized installation occasions. Existing power cords cannot be adjusted according to the actual length needed, which may cause the installation work to be unable to proceed smoothly. Moreover, some power cords are set to a longer structure, but the excess length of the power cord is prone to entanglement and accumulation, which may also cause heat to accumulate. Long-term exposure to such a high-temperature environment may accelerate the aging of the insulating layer of the power cord and reduce its insulating performance, thereby increasing the safety hazard. SUMMARY

[0004] The present application aims to overcome the defects of the prior art and provide a telescopic power cord for energy-saving LED lamps and lanterns and an energy-saving LED lamps and lanterns.

[0005] In order to achieve the above object, the present application provides the following technical scheme: a power line, comprising a wire body and a winding unit, the winding unit comprising an outer cylinder part, an inner cylinder part, a fixed seat fixedly connected with the outer cylinder part, a first fixed ring fixedly connected with the inner cylinder part, a second fixed ring fixedly connected with the inner cylinder part, a third fixed ring fixedly connected with the first fixed ring through a plurality of first connecting rods, a plurality of second connecting rods connecting the second fixed ring and the third fixed ring, and three guide wheel units, the guide wheel unit comprising a limiting insertion rod, a fixed pulley mounted at the end of the limiting insertion rod, and a first ratchet fixed to the limiting insertion rod, the third fixed ring being provided with three limiting insertion holes matched with the limiting insertion rod; the three guide wheel units are respectively a first guide wheel unit close to the second fixed ring, a second guide wheel unit close to the first fixed ring, and a third guide wheel unit close to the second fixed ring; the first fixed ring is provided with two limiting plates, the second fixed ring is provided with one limiting plate, and the limiting plate is provided with a plurality of second ratchets matched with the first ratchet; the inner cylinder part is provided with a first through hole and a second through hole, the first fixed ring is provided with a first perforation and a second perforation, the fixed seat is provided with a third perforation, and the third fixed ring is provided with a first through hole, a second through hole, a third through hole and a fourth through hole; the wire body passes through the first perforation, the first through hole, the fixed pulley of the first guide wheel unit, the second through hole, the fixed pulley of the second guide wheel unit, the third through hole, the fixed pulley of the third guide wheel unit, the fourth through hole, the second perforation, the first through hole, the second through hole and the third perforation in sequence.

[0006] Further, the cross section of the limiting insertion rod is rectangular.

[0007] Further, the first through hole is close to the first fixed ring and located on the outside of the first fixed ring.

[0008] Further, the second through hole is close to the second fixed ring and located on the outside of the second fixed ring.

[0009] Further, it further comprises an inner rotating ring surrounding the third fixed ring and located in the outer cylinder part, two toggle rods being fixed to one side of the inner rotating ring close to the first fixed ring, and one toggle rod being fixed to one side of the inner rotating ring close to the second fixed ring; the end of the limiting plate is fixed with a wedge block capable of abutting against the toggle rod; the three toggle rods correspond to the wedge blocks of the three limiting plates one by one; the outer cylinder part is provided with a circular annular groove, an outer rotating ring is mounted in the circular annular groove, the circular annular groove is provided with an arc-shaped through slot, the inner rotating ring is provided with a threaded hole, the outer rotating ring is provided with a bolt through hole, and a fixing bolt passing through the arc-shaped through slot and matched with the threaded hole is mounted in the bolt through hole.

[0010] Further, with the rotation of the inner rotating ring, the three toggle rods can abut against the three wedge blocks to make the three limiting plates expand outward.

[0011] Thus, the first ratchet and the second ratchet are spaced apart, so that the wire body is easier to pull.

[0012] Further, the toggle lever comprises an L-shaped lever fixedly connected with the inner rotating ring and an abutting lever fixedly connected with the L-shaped lever.

[0013] Further, the outer circumferential surface of the inner cylinder portion is provided with a first circular annular slide rail, and the inner circumferential surface of the inner cylinder portion is provided with a second circular annular slide rail; the outer cylinder portion is provided with a circular annular protrusion having a first circular annular slide groove matched with the first circular annular slide rail; the fixing seat comprises a first annular seat fixedly connected with the outer cylinder portion and a second annular seat fixedly connected with the first annular seat, and the second annular seat is provided with a second circular annular slide groove matched with the second circular annular slide rail.

[0014] Further, the part of the wire body between the inner cylinder portion and the outer cylinder portion is helical.

[0015] Further, the inner cylinder portion is provided with a plurality of annular strip-shaped through grooves distributed at equal intervals, and the length direction of the strip-shaped through grooves is consistent with the length direction of the inner cylinder portion.

[0016] Thus, the wire body between the inner cylinder portion and the outer cylinder portion can be better cooled. Further, the end portion of the outer cylinder portion is connected with an end ring through a plurality of end portion rods; the end ring is fixedly provided with a protruding portion, and the protruding portion is installed with a first threading seat through a rotating shaft, and the first threading seat is provided with a plurality of first locking bolts for locking the relative positions of the wire body and the first threading seat.

[0017] Thus, the first threading seat can rotate relative to the protruding portion, so that the first threading seat has better adaptability in the subsequent operation of rotating the inner cylinder portion.

[0018] Further, the fixing seat is fixedly provided with a second threading seat, and the second threading seat is provided with second locking bolts for locking the relative positions of the wire body and the second threading seat.

[0019] Further, one end of the inner cylinder portion is fixedly provided with an annular abutting plate, and the first annular seat is installed with third locking bolts capable of abutting the annular abutting plate to lock the relative positions of the first annular seat and the annular abutting plate.

[0020] Thus, the relative positions of the inner cylinder portion and the outer cylinder portion can be locked.

[0021] Further, the second threading seat is fixedly connected with the first annular seat.

[0022] Further, the first threading seat has a first threading channel, and the second threading seat has a second threading channel.

[0023] Further, the first through hole, the second through hole, the third through hole and the fourth through hole at the third fixed ring are annularly and equidistantly distributed.

[0024] Further, the end of the inner cylinder part has a plurality of first anti-skid protrusions.

[0025] Thus, the first anti-skid protrusions increase the friction, and it is more convenient to rotate the inner cylinder part.

[0026] Further, the outer rotating ring has a plurality of second anti-skid protrusions.

[0027] Thus, the second anti-skid protrusions increase the friction, and it is more convenient to rotate the outer rotating ring.

[0028] Further, the two limiting plates at the first fixed ring are respectively a first limiting plate matched with the limiting plug rod of the first guide wheel unit and a third limiting plate matched with the limiting plug rod of the third guide wheel unit; the limiting plate at the second fixed ring is a second limiting plate matched with the limiting plug rod of the second guide wheel unit.

[0029] Further, the number of the first connecting rods is four, and they are annularly and equidistantly distributed.

[0030] Further, the number of the second connecting rods is four, and they are annularly and equidistantly distributed.

[0031] Further, the third fixed ring has a third circular ring-shaped sliding rail, and the inner rotating ring has a third circular ring-shaped sliding groove matched with the third circular ring-shaped sliding rail.

[0032] Further, both ends of the electric wire body are connected with electric wire joint units.

[0033] Further, the electric wire body sequentially comprises an outer protective layer, a flame-retardant layer and a plurality of wire cores from outside to inside, and the wire core comprises an insulating layer and a conductor in the insulating layer.

[0034] The application further discloses an energy-saving LED lamp, which comprises an LED lamp head, a mounting pipe fixedly connected with the LED lamp head and the telescopic power cord.

[0035] Further, one of the electric wire joint units at the electric wire body extends into the shell of the LED lamp head, and the other electric wire joint unit extends out of the end of the mounting pipe.

[0036] Further, the lamp head of the LED lamp head has a top cover.

[0037] Thus, it is convenient to open the top cover and connect the power cord. Beneficial effects

[0038] 1、The telescopic power cord of the present application can adjust the length of the extension according to the actual demand, thereby avoiding installation problems caused by improper length.

[0039] 2、The telescopic power cord of the present application, the wire body is uniformly distributed in the outer cylinder part, and can avoid winding, thereby reducing heat accumulation, reducing safety hazards caused by overheating, and prolonging the service life of the power cord.

[0040] 3、The LED lamp of the present application, the first, second and third fixing rings are all provided with holes, when the LED lamp works, the convection air flow can enter the inside of the LED lamp head shell through the holes, which plays a heat dissipation role for the wire body, and guarantees the stable operation of the lamp. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 Separation diagram of the power cord from the LED lamp head and the installation pipe;

[0042] Figure 2 Power cord schematic diagram when the inner cylinder part and the outer cylinder part are cut off in part;

[0043] Figure 3 Enlarged view of area A;

[0044] Figure 4 Another perspective view of Figure 2 ;

[0045] Figure 5 Enlarged view of area B;

[0046] Figure 6 Enlarged view of area C;

[0047] Figure 7 Separation diagram of the outer cylinder part and the inner cylinder part;

[0048] Figure 8 Separation diagram of the inner cylinder part and the outer cylinder part when the inner cylinder part and the outer cylinder part are cut off in part;

[0049] Figure 9 Enlarged view of area D;

[0050] Figure 10 Enlarged view of area E;

[0051] Figure 11 Enlarged view of area F;

[0052] Figure 12 Enlarged view of area G;

[0053] Figure 13 Another perspective view of Figure 5 ;

[0054] Figure 14 Enlarged view of region H;

[0055] Figure 15 Enlarged view of region I.

[0056] Reference signs: wire body 1; outer sheath 1.1; flame retardant layer 1.2; insulation layer 1.3; conductor 1.4; outer cylinder part 2; fixing seat 2.1; third through hole 2.1.1; first annular seat 2.1.2; second annular seat 2.1.3; second circular annular sliding groove 2.1.4; third locking bolt 2.1.5; circular annular groove 2.2; arc-shaped through slot 2.3; first circular annular sliding groove 2.4; end part rod 2.5; end part ring 2.6; protruding part 2.7; inner cylinder part 3; first fixing ring 3.1; first through hole 3.1.1; second through hole 3.1.2; second fixing ring 3.2; third fixing ring 3.3; first through hole 3.3.1; second through hole 3.3.2; third through hole 3.3.3; fourth through hole 3.3.4; first connecting rod 3.4; second connecting rod 3.5; first through hole 3.6; second through hole 3.7; first circular annular sliding rail 3.8; second circular annular sliding rail 3.9; first anti-skid protrusion 3.10; first guide wheel unit 4.1; second guide wheel unit 4.2; third guide wheel unit 4.3; limiting insertion rod 4.4; fixed pulley 4.5; limiting plate 5; second ratchet 5.1; wedge-shaped block 5.2; inner rotating ring 6; actuating rod 6.1; threaded hole 6.2; outer rotating ring 7; fixing bolt 7.1; second anti-skid protrusion 7.2; first threading seat 8; first locking bolt 8.1; second threading seat 9; second locking bolt 9.1; annular abutment plate 10; wire connector unit 11; LED lamp holder 12; top cover 12.1; mounting pipe 13; locking bolt 13.1. DETAILED DESCRIPTION

[0057] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application. Example 1

[0058] The embodiment provides a telescopic power cord for energy-saving LED lamps as shown. The telescopic power cord comprises a power cord body 1 and a winding unit. The winding unit comprises an outer cylinder part 2, an inner cylinder part 3, a fixed seat 2.1 fixedly connected with the outer cylinder part 2, a first fixed ring 3.1 fixedly connected with the inner cylinder part 3, a second fixed ring 3.2 fixedly connected with the inner cylinder part 3, a third fixed ring 3.3 fixedly connected with the first fixed ring 3.1 through a plurality of first connecting rods 3.4, a plurality of second connecting rods 3.5 connecting the second fixed ring 3.2 and the third fixed ring 3.3, and three guide wheel units. The guide wheel unit comprises a limiting insertion rod 4.4, a fixed pulley 4.5 mounted at the end of the limiting insertion rod 4.4, and a first ratchet fixed to the limiting insertion rod 4.4. The third fixed ring 3.3 is provided with three limiting insertion holes matched with the limiting insertion rod 4.4. The three guide wheel units are respectively a first guide wheel unit 4.1 close to the second fixed ring 3.2, a second guide wheel unit 4.2 close to the first fixed ring 3.1, and a third guide wheel unit 4.3 close to the second fixed ring 3.2. The first fixed ring 3.1 is provided with two limiting plates 5. The second fixed ring 3.2 is provided with one limiting plate 5. The limiting plate 5 is provided with a plurality of second ratchets 5.1 matched with the first ratchet. The inner cylinder part 3 is provided with a first through hole 3.6 and a second through hole 3.7. The first fixed ring 3.1 is provided with a first perforation 3.1.1 and a second perforation 3.1.2. The fixed seat 2.1 is provided with a third perforation 2.1.1. The third fixed ring 3.3 is provided with a first through hole 3.3.1, a second through hole 3.3.2, a third through hole 3.3.3, and a fourth through hole 3.3.4. The power cord body 1 sequentially passes through the first perforation 3.1.1, the first through hole 3.3.1, the fixed pulley of the first guide wheel unit 4.1, the second through hole 3.3.2, the fixed pulley of the second guide wheel unit 4.2, the third through hole 3.3.3, the fixed pulley of the third guide wheel unit 4.3, the fourth through hole 3.3.4, the second perforation 3.1.2, the first through hole 3.6, the second through hole 3.7, and the third perforation 2.1.1. The telescopic power cord further comprises an inner rotating ring 6 surrounding the third fixed ring 3.3 and located in the outer cylinder part 2. The inner rotating ring 6 is fixed with two push rods 6.1 on the side close to the first fixed ring 3.1 and one push rod 6.1 on the side close to the second fixed ring 3.2. The end of the limiting plate 5 is fixed with a wedge block 5.2 capable of abutting against the push rod 6.1. The three push rods 6.1 correspond to the wedge blocks 5.2 of the three limiting plates 5 one by one. The outer cylinder part 2 is provided with a circular annular groove 2.2. An outer rotating ring 7 is mounted in the circular annular groove 2.2. The circular annular groove 2.2 is provided with an arc-shaped through slot 2.3. The inner rotating ring 6 is provided with a threaded hole 6.2. The outer rotating ring 7 is provided with a bolt through hole. A fixed bolt 7.1 passing through the arc-shaped through slot 2.3 and matched with the threaded hole is mounted in the bolt through hole.

[0059] The toggle lever 6.1 comprises an L-shaped lever fixedly connected with the inner rotating ring 6 and an abutting lever fixedly connected with the L-shaped lever. The outer circumferential surface of the inner cylinder portion 3 is provided with a first circular annular slide rail 3.8, and the inner circumferential surface of the inner cylinder portion 3 is provided with a second circular annular slide rail 3.9; the outer cylinder portion 2 is provided with a circular annular protrusion having a first circular annular slide groove 2.4 matched with the first circular annular slide rail 3.8; the fixed seat 2.1 comprises a first annular seat 2.1.2 fixedly connected with the outer cylinder portion 2 and a second annular seat 2.1.3 fixedly connected with the first annular seat, and the second annular seat 2.1.3 is provided with a second circular annular slide groove 2.1.4 matched with the second circular annular slide rail 3.9. The portion of the wire body 1 between the inner cylinder portion 3 and the outer cylinder portion 2 is helical; the inner cylinder portion 3 is provided with a plurality of annular strip-shaped through grooves distributed at equal intervals, and the length direction of the strip-shaped through grooves is consistent with the length direction of the inner cylinder portion 3. The end portion of the outer cylinder portion 2 is connected with an end ring 2.6 through a plurality of end portion rods 2.5; the end ring 2.6 is fixedly provided with a protruding portion 2.7, the protruding portion 2.7 is installed with a first threading seat 8 through a rotating shaft, and the first threading seat 8 is provided with a plurality of first locking bolts 8.1 for locking the relative position of the wire body 1 and the first threading seat 8; the fixed seat 2.1 is fixedly provided with a second threading seat 9, and the second threading seat 9 is provided with second locking bolts 9.1 for locking the relative position of the wire body 1 and the second threading seat 9; one end of the inner cylinder portion 3 is fixedly provided with an annular abutting plate 10, and the first annular seat 2.1.2 is installed with a third locking bolt 2.1.5 capable of abutting the annular abutting plate 10 to lock the relative position of the first annular seat 2.1.2 and the annular abutting plate 10. The first through hole 3.3.1, the second through hole 3.3.2, the third through hole 3.3.3 and the fourth through hole 3.3.4 of the third fixed ring 3.3 are annularly and equally spaced; the end portion of the inner cylinder portion 3 is provided with a plurality of first anti-skid protrusions 3.10; the outer rotating ring 7 is provided with a plurality of second anti-skid protrusions 7.2. The two limiting plates 5 of the first fixed ring 3.1 are respectively a first limiting plate matched with the limiting insertion rod of the first guide wheel unit 4.1 and a third limiting plate matched with the limiting insertion rod of the third guide wheel unit 4.3; the limiting plate 5 of the second fixed ring 3.2 is a second limiting plate matched with the limiting insertion rod of the second guide wheel unit 4.2; the number of the first connecting rods 3.4 is four, and they are annularly and equally spaced; the number of the second connecting rods 3.5 is four, and they are annularly and equally spaced; the third fixed ring 3.3 is provided with a third circular annular slide rail, and the inner rotating ring 6 is provided with a third circular annular slide groove matched with the third circular annular slide rail. Both ends of the wire body 1 are connected with wire joint units 11; the wire body 1 comprises, from outside to inside, an outer sheath 1.1, a flame-retardant layer 1.2 and a plurality of wire cores, the wire core comprising an insulating layer 1.3 and a conductor 1.4 in the insulating layer.

[0060] Working principle: the telescopic power cord of the application can be installed in the mounting pipe of the LED lamp holder after adjusting the required length, so that the wire body extends to the appropriate length, and the wire body in the outer cylinder part is evenly distributed, so as to avoid heat accumulation caused by winding of the wire body. And since the first, second and third fixed rings have holes, the convection airflow can still pass through the first, second and third fixed rings into the interior of the LED lamp holder shell when the LED lamp works, thereby achieving heat dissipation of the LED lamp holder.

[0061] The power cord of the application, since the wire body is reciprocally arranged in three guide wheel units, and the inner cylinder part and the outer cylinder part can be spirally wound, the length of the wire body that can be pulled out is longer without increasing the volume, so that it can be used more widely. The specific installation and adjustment method is as follows: in the initial state, the fixed bolt at the outer rotating ring is fixedly connected with the threaded hole at the inner rotating ring. At this time, rotate the outer rotating ring (only need to rotate slightly, and make the outer rotating ring keep the position after rotation, so as to facilitate pulling the wire body), so that the outer rotating ring drives the inner rotating ring to rotate through the fixed bolt, the inner rotating ring drives several shift rods to rotate, so that the shift rod abuts against the wedge block, so that the three limiting plates bend away from the corresponding limiting inserting rod, so that the first and second ratchet teeth have a certain distance. At this time, since the first and second ratchet teeth are not in contact, it is easier to pull the wire body. At this time, pull the first wire connector unit (the wire connector unit close to the first fixed ring is called the first wire connector unit), pull it to the appropriate length, and then lock the position of the first wire seat and the wire body with the first locking bolt (when locking, the outer rotating ring can be restored to the initial state, and the first and second ratchet teeth are locked at this time).

[0062] Then, the operation of rotating the outer rotating ring is repeated, the second wire joint unit (the wire joint unit close to the second fixed ring is called the second wire joint unit) is pulled to the appropriate length, and then the outer rotating ring is restored to the initial position, and the position of the wire body and the second threading seat is locked by the second locking bolt. At this time, the fixed bolt is removed, and when the second wire joint unit is installed, there may be excess length after installation, which is exposed outside and is not good. At this time, the second locking bolt can be loosened, the inner cylinder part is rotated (at this time, the first, second and third fixed rings and the three guide wheel units rotate with the inner cylinder part), so that the inner cylinder part is similar to the principle of the reel, and the excess length of the wire body is retracted to between the inner cylinder part and the outer cylinder part (at this time, due to the limiting of the first and second ratchets, the positions of the three guide wheel units will not change), and after the excess length is retracted to between the inner cylinder part and the outer cylinder part (usually the excess length pulled out will not be too much, and the inner cylinder part is rotated by half a turn to several turns), the position of the wire body and the second threading seat is locked by the second locking bolt, and then the relative position of the inner cylinder part and the outer cylinder part is locked by the third locking bolt. Although the inner cylinder part rotates relative to the outer cylinder part, due to the limiting of the first threading seat, one end of the first wire joint unit of the wire body remains in a fixed position, and the first threading seat can rotate at the protruding part, so as to better adapt to the direction of the wire body at this time. In this way, when the wire body is connected to the power supply unit and the power consumption unit, the wire body can be kept at an appropriate length, the excess length can be stored in the outer cylinder part, the wire body will not be wound together to cause heat accumulation, and air convection can also pass through the first, second and third fixed rings, thereby achieving heat dissipation of the internal wire body. Embodiment 2

[0063] The embodiment provides an energy-saving LED lamp, which comprises an LED lamp head 12, a mounting pipe 13 fixedly connected with the LED lamp head 12 and the telescopic power line described in embodiment 1; the mounting pipe 13 is provided with a locking bolt 13.1, the telescopic power line is mounted in the mounting pipe 13, and the relative position of the mounting pipe 13 and the outer cylinder part 2 is locked by the locking bolt 13.1. One of the wire joint units 11 of the wire body 1 extends into the shell of the LED lamp head, and the other wire joint unit 11 extends out of the end of the mounting pipe 13. Therefore, the power line of the application can be used to connect the driving power supply and the power supply unit in the LED lamp head through the two wire joint units.

[0064] Although the application is illustrated and described in terms of preferred embodiments, those skilled in the art will understand that various changes and modifications can be made to the application without departing from the scope of the claims of the application.

Claims

1. A retractable power cord for energy-saving LED lamps, characterized in that: The present invention relates to a wire winding unit, wherein the wire winding unit comprises an outer cylinder, an inner cylinder, a fixing seat fixedly connected to the outer cylinder, a first fixing ring fixedly connected to the inner cylinder, a second fixing ring fixedly connected to the inner cylinder, a third fixing ring fixedly connected to the first fixing ring through a plurality of first connecting rods, a plurality of second connecting rods connecting the second fixing ring and the third fixing ring, and three guide wheel units, wherein the guide wheel unit comprises a limiting plug rod, a fixed pulley installed at the end of the limiting plug rod and a first ratchet fixed to the limiting plug rod, and the third fixing ring has three limiting plug holes that cooperate with the limiting plug rod; the three guide wheel units are respectively a first guide wheel unit close to the second fixing ring, a second guide wheel unit close to the first fixing ring, and a third guide wheel unit close to the second fixing ring. a third guide wheel unit; the first fixing ring has two limit plates, the second fixing ring has a limit plate, the limit plate has a plurality of second ratchet teeth cooperating with the first ratchet teeth; the inner cylinder has a first through hole and a second through hole, the first fixing ring has a first through hole and a second through hole, the fixing seat has a third through hole, the third fixing ring has a first through hole, a second through hole, a third through hole and a fourth through hole; the electric wire body passes through the first through hole, the first through hole, the fixed pulley of the first guide wheel unit, the second through hole, the fixed pulley of the second guide wheel unit, the third through hole, the fixed pulley of the third guide wheel unit, the fourth through hole, the second through hole, the first through hole, the second through hole and the third through hole in sequence; The retractable power cord for energy-saving LED lamps further comprises an inner rotating ring surrounding the third fixing ring and located inside the outer cylinder portion, wherein two toggle rods are fixed to the side of the inner rotating ring close to the first fixing ring, and a toggle rod is fixed to the side close to the second fixing ring; a wedge-shaped block capable of abutting against the toggle rod is fixed to the end of the limit plate; the three toggle rods correspond one-to-one to the wedge-shaped blocks of the three limit plates; the outer cylinder portion comprises a circular groove, the circular groove comprises an outer rotating ring installed in the circular groove, the circular groove comprises an arc-shaped through groove, the inner rotating ring comprises a threaded hole, the outer rotating ring comprises a bolt through hole, and the bolt through hole is mounted with a fixing bolt that passes through the arc through groove and cooperates with the threaded hole; The outer circumferential surface of the inner cylinder part is provided with a first annular slide rail, and the inner circumferential surface of the inner cylinder part is provided with a second annular slide rail; the outer cylinder part is provided with an annular protrusion, and the annular protrusion has a first annular slide groove that cooperates with the first annular slide rail; the fixed seat includes a first annular seat fixedly connected to the outer cylinder part and a second annular seat fixedly connected to the first annular seat, and the second annular seat has a second annular slide groove that cooperates with the second annular slide rail.

2. The retractable power cord for energy-saving LED lamps according to claim 1, characterized in that: The toggle rod comprises an L-shaped rod fixedly connected to the inner rotating ring and an abutting rod fixedly connected to the L-shaped rod.

3. The retractable power cord for energy-saving LED lamps according to claim 1, characterized in that: The portion of the wire body located between the inner cylinder and the outer cylinder is spiral-shaped; the inner cylinder has a plurality of strip-shaped through grooves distributed in an annular shape with equal intervals, and the length direction of the strip-shaped through grooves is consistent with the length direction of the inner cylinder.

4. The retractable power cord for energy-saving LED lamps according to claim 1, characterized in that: The end of the outer cylinder is connected to an end ring through a plurality of end rods; a protrusion is fixed at the end ring, and a first threading seat is installed at the protrusion through a rotating shaft, and the first threading seat has a plurality of first locking bolts for locking the relative position of the wire body and the first threading seat; a second threading seat is fixed at the fixed seat, and the second threading seat has a second locking bolt for locking the relative position of the wire body and the second threading seat; an annular abutment plate is fixed at one end of the inner cylinder, and a third locking bolt is installed at the first annular seat that can abut the annular abutment plate to lock the relative position of the first annular seat and the annular abutment plate.

5. The retractable power cord for energy-saving LED lamps according to claim 1, characterized in that: The first through hole, the second through hole, the third through hole and the fourth through hole at the third fixed ring are distributed in a circular shape with equal intervals; the end of the inner cylinder has a plurality of first anti-slip protrusions; the outer rotating ring has a plurality of second anti-slip protrusions.

6. The retractable power cord for energy-saving LED lamps according to claim 1, characterized in that: The two limit plates at the first fixed ring are respectively a first limit plate cooperating with the limit rod of the first guide wheel unit and a third limit plate cooperating with the limit rod of the third guide wheel unit; the limit plate at the second fixed ring is a second limit plate cooperating with the limit rod of the second guide wheel unit; the number of first connecting rods is four, and they are distributed in a circular shape with equal intervals; the number of second connecting rods is four, and they are distributed in a circular shape with equal intervals; the third fixed ring has a third circular slide rail, and the inner rotating ring has a third circular slide groove cooperating with the third circular slide rail.

7. The retractable power cord for energy-saving LED lamps according to claim 1, characterized in that: Both ends of the wire body are connected to wire connector units; the wire body comprises an outer protective layer, a flame retardant layer and a plurality of wire cores from the outside to the inside, and the wire cores comprise an insulating layer and a conductor located in the insulating layer.

8. An energy-saving LED lamp, characterized in that: It includes an LED lamp holder, a mounting tube fixedly connected to the LED lamp holder, and the retractable power cord according to any one of claims 1 to 7; the mounting tube has a locking bolt, the retractable power cord is installed in the mounting tube, and the locking bolt locks the relative position of the mounting tube and the outer tube.

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